
In Ontario, public pool safety is primarily governed by Regulation 565 (Public Pools) under the Health Protection and Promotion Act. As of January 1, 2025, significant updates were implemented to modernize these rules, particularly regarding "floatation tanks" and specific chemical ranges.
This regulation is the legal backbone for all public aquatic facilities in the province. It classifies pools into three main types:
Class A: Public pools (municipal centers, schools, major athletic clubs).
Class B: Semi-public pools (hotels, apartment buildings with >5 units, campgrounds).
Class C: Wading pools, splash pads, and water slide receiving basins.
Key Requirements:
Supervision: Class A pools must be supervised by certified lifeguards. Class B pools may be unsupervised if specific cautionary signage is clearly posted.
Water Chemistry (2025/2026 Standards):
Chlorine: Minimum 1.0 ppm for pools; 2.0 ppm for spas/hot tubs. New upper limits were added (e.g., 10.0 ppm max for chlorine).
pH: Must be between 7.2 and 7.8.
Alkalinity: Now requires a minimum of 80 ppm.
Safety Equipment: Must include a spine board, a non-conducting reaching pole, and an emergency telephone directly linked to emergency services (911).
Black Disc: A black disc (150mm in diameter) must be permanently affixed to the pool bottom at the deepest point to verify water clarity.
Recent amendments have introduced stricter oversight:
Notification: Operators must notify the local Medical Officer of Health at least 14 days before opening or re-opening a pool.
Public Disclosure: Facilities must now post their inspection results (often a green/yellow/red sign) near the entrance, similar to restaurant "DineSafe" programs.
Admission Standards: Class A pools must have a "Guardian Supervision" policy for children under 10 years old (often implemented as a wristband system).
While Reg 565 covers health, the Ontario Building Code (OBC) and municipal bylaws cover construction:
Fence Height: Generally a minimum of 1.2m (4 ft) for residential/Class B, though many cities like Toronto mandate 1.5m (5 ft).
Self-Closing Gates: Gates must swing outward (away from the pool), be self-closing, and have a self-latching device at least 1.35m above the ground.
Non-Climbable: Fences must use vertical slats or mesh small enough (usually <38mm) to prevent children from gaining a foothold.
Ontario Regulation 565 (Full Text): The official, most up-to-date provincial legislation on E-Laws.
Summary of 2025 Regulatory Changes (PDF): (Search the Ministry of Health portal for the "January 2025 Update" slide deck/briefing).
Lifesaving Society Ontario - Guide to Reg. 565: The "industry bible" for Ontario operators that explains how to practically apply the law.
Toronto Pool Enclosure Bylaw (Example): A reference for one of the strictest municipal fencing laws in the province.
Note: If you are a pool operator, you are legally required to keep daily logs of water tests (taken every 2 hours for spas, or at least every 4 hours for pools) and keep those records for at least one year.